Pipe-damper.



C. DE W. WAGNER.

PIPE DAMPER.

APPLIOATION FILED APR.17, 1914.

1,1015222. Patented June 23, 1914.

C' OLFJMBM PLANOGRAPH 60., WASHINGTON, D. C.

UNITED STATES PATENT OFFICE.

CLINTON DE WITT WAGNER, OF CEDAR RAPIDS, IOWA.

PIPE-DAMPER.

To all whom it may concern:

Be it known that I, CLINTON DE Wrr'r WAGNER, a citizen of the UnitedStates, residing at Cedar Rapids, in the county of Linn and State ofIowa, have invented certain new and useful Improvements in Pipe-Dampers, and do hereby declare'the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to pipe-dampers, and more particularly to thoseof large size used in connection with hot-air furnaces; and the objectof the invention is to provide a handle and spur or spindle which areinexpensive, easily attached to the damper disk, and when so attachedthe damper may be easily inserted in a joint of pipe.

The invention is fully disclosed in the description and claimsfollowing, reference being had to the accompanying drawing, in whichFigure 1 is a plan View illustrating my improved damper, partly insection. Fig. 2 is a view of the same as seen from the right end ofFig. 1. Fig. 3 is a side view of the handle, partly in section. Fig. 4is a view in perspective of the spur or spindle. Fig. 5 is a view of theouter washer to be mounted on the handle. Fig. 6 is a similar view ofthe inner washer.

Referring to the drawing, 1 denotes a hotair or smoke pipe, perforatedat 2 and 3 to receive the handle and spur, respectively of a damper. Thelatter, in the case of furnaces, is usually a round disk of sheet metal4, cut out by the tinsmith. The attachments for mounting and turnin thedamper form the subject matter of thls invention, taken in connectionwith so forming the disk as to adapt it for its attachments. One side ofthe disk is provided with a spur 5, which serves as one of the pivots onwhich the damper turns in the pipe. This is formed of wire, bent tothehelical form shown at 6, so as to make a broad bearing on one side ofthe disk. One end of the wire projects outwardly at 7, and the other endis bent down at a right angle or less at 8, and cut diagonally at 9 andat the outer side as regards the bend. The object of this diagonal cutis to make a sharp point at the end of the tang which will admit of thetang being driven through the disk without preliminary punching, theplate being placed over a Specification of Letters Patent.

Application filed April 17, 1914.

Patented June 23, 1914.

Serial No. 832,662.

soft wood block, a hole, or the slightly opened j aWs of a vise. Theinclination of the cut is such, also, that when so driven through theplate the tang may be clenched on an iron block without turning over theplate. It is to be, noted furthermore that the fastening is by a singletang, and at some distance from the edge of the plate. If, as oftenhappens, the workman is not careful to center the spur exactly, or whatis still more likely to occur, fails to punch the holes in the pipeexactly central, the spur may be turned to one side or the other, asindicated in Fig. 1, and the eccentricity does not cause the damper tobind on the inside of the pipe. The other pivot for the damper is alsoformed of wire, and it and its connections will now be described. Apiece of stout wire 10 is bent back on itself at 11, and twisted to forma shank 12, the shank and that portion of the loop leading to it beingof smaller diameter than the extreme terminal of the loop. The free legs13 and 14 are provided with oppositely projecting terminal tangs 15,bent at a right angle or less, and cut diagonally at 16 in the samemanner and for the same purpose as is the tang of the spur. The legspass through holes 17 in a cupped washer 18, and are then bent outwardlyto about a right angle, as shown. The bending of the legs forces thewasher tightly into the twist of the shank, thus holding it firmly inposition. It is cupped on the side next the shank so that the bur 19formed on the inner side of the pipe by punching the hole for the shankdoes not interfere with the washer or any other part of the damper, andthe edge of the washer on the concave side makes a neat and firm bearingagainst the inside of the pipe. To make a place for the cupped washer anotch 20 is out in that side of the damper. The shank is attached to thedamper by driving its tangs through the plate from opposite sides, andclenching them, substantially as shown. Adjacent to the cupped washer isanother washer 21, preferably beaded at 22 to form an inner seat for aspring 23 slipped over the shank. To the end of the shank is attached abutton or handle 24: provided with a substantially diamond-shaped hole25, the shorter axis of which is less than the diameter of theshank-loop at its extremity. The longer .axis of the hole permits thehandle to be slipped on the shank, pressing the interposed springinwardly, and then by a quarter turn it is brought to holding positionon the shank, the spring then serving to force the handle into thisholding position, and also to force the outer washer to bearing positionagainst the outside of the pipe. The opposed washers thus afford abroad, smooth bearing on the inside and outside of the pipe, and thespring supplies the necessary friction to hold the damper in any desiredposition.

Having thus described my invention, I claim:

1. The combination with a damper-plate, of a spur formed of wire, thehead portion thereof being helical, and terminating in a centrallydisposed tang bent substantially at right angles to the plane of thehelix, and beveled on its outer side at the end.

2. As a new article of manufacture, a pipe-damper spur formed of wire,and having a helical head portion terminating in a centrally disposedtang bent at practically a right angle tothe plane of the helix, andsharpened at the end.

3. In combination with a damper-plate, a handle, comprising a shankformed of a piece of wire bent back upon itself and twisted a part ofits length to form the shank proper, the diverging legs being providedwith sharpened tangs adapted to pene trate and clench against the plate,and the terminal loop being widest at its extremity, and a handleadapted to slip over said loop and engage it by turning partly aroundand forcing it outwardly.

4:. In combination with a damper-plate, a handle composed of a piece ofwire folded upon itself and twisted for some distance to form a shank,the loop being widest at its extremity, and the diverging legs beingprovided with sharpened tangs adapted to penetrate the plate and clenchthereon, a handle adapted to slip. over the loop and en- Copies of thispatent may be obtained for at its extremity, the doubled wires twistedto form a shank, and the diverging legs being provided with sharpenedtangs adapted to penetrate said plate, a handle adapted to slip oversaid loop and engage the same when turned, a washer adapted to bearvagainst the outside of the pipe, and a spring interposed between thehandle and washer.

6. In combination with a damper-plate, a shank attachablethereto, havingan outward extension largest at its end, a handle adapted toslip oversaid end and engage it when turned on the shank, a spring adapted tohold said handle in engagement, and an internal, cupped washer adaptedto bear against the inside of the pipe outside the bur formed bypunching the same.

7. In combination with a damper-plate, a spur pivotally connected withsaid plate,

and a handle comprising a shank with di-,

verging legs having terminal tangs adapted to penetrate the plate, ahandle or button attachable to the shank by slipping over its end andturning it a little on said shank, a spring adapted to hold the buttonin engagement, a washer engaged by the inner end of the spring, and acupped washer opposed thereto, and adapted to bear on the inner side ofthe pipe, said plate being notched to receive said cupped washer.

In testimony whereof I atfix my signature in presence of two witnesses.

CLINTON DE WITT WAGNER.

Witnesses: V

EMMA G. SUFrrcooL, H. D. CONE.

five cents each, by addressing the Commissioner of Patents, Washington,D. 0. t e

